Tim has a passion building heads and started at Entec in Toronto before he started doing mostly Hemi Iron and Stage V Hemi Heads in his own shop. His program on the Stage V CNC is real nice. I have dealt with him since the seventies well before it was called FHO. Every one of the guys that races NSS in my area has FHO heads on their motor, most are 604s a few 572s. Tim will talk on the phone and that is nice. Good luck on your build research everything and them go back and talk to Tim.